No-knock raids are becoming exceedingly common - often for
their harassment and intimidation value rather than any
thought of finding evidence of real wrongdoing.

Execellent!

What testimony can be compelled in what circumstances varies
widely between jurisdictions, as do the penalties for non-
compliance.

Some good comments.

In America, you reply:

To all prying questions: Officer, my lawyer has informed me that
all the information you need from me is on my drivers license.

Upon further intimidation: Officer, I have told you what my lawyer
has advised me to say. Since you refuse to hear it, I therefore
exercise my right to remain silent. If I am detained or arrested,
I wish to see a lawyer immediately.

Always remember that police officers must have arrest quotas to
prove that they are doing their job. This creates a huge door for
unscrupulous behavior. The reason cops ask so many questions is
solely for the purpose of trapping you in your words. They are
trained in what questions to ask unto this purpose. It is
therefore very dangerous to cooperate with them in this endeavor.
Simply purse your lips and say nothing to their questions. Other
than verbal intimidation, they can do absolutely nothing to force
you to say something. Never forget Scooter Libby and Martha
Stewart. They naively cooperated with a DA, expecting them to be
honestly seeking the truth. But in face they were hell bent on
destroying these two people and did. They were convicted on
charges not relating to the original accusations.

In today's America, you are dealing with no less than vicious
Nazis when it comes to government authorities (people being fully
controlled by evil demonic spirits). Do not allow them to lulled
you into thinking that they are seeking your best interest.
Recognize them for what they are and conduct business with them
accordingly!